Abstract
A pulse train programmer for a spin–echo NMR relaxometer–diffusiometer is based on an AT89C51-24PC microcontroller. The programmer ensures the arbitrary generation of pulse trains with a minimum train step of 30 μs and recording of up to 30 000 10-bit amplitudes of spin–echo NMR signals with a minimum quantization step of 3 μs. The all-in-one one-board programmer is connected to a computer serial asynchronous data port, which is compatible with NMR relaxometer–diffusiometers of almost any design.
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